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Introduction and performance table of neodymium iron boron magnets

The third-generation rare earth permanent magnet NdFeB is the most powerful permanent magnet among contemporary magnets. Its BHmax value is 5-12 times that of ferrite magnets and 3-10 times that of alnico magnets; its coercive force is equivalent to 5-10 times that of ferrite magnets and 5 to 10 times that of alnico magnets. 15 times, its potential magnetic properties are extremely high, and it can suck up heavy objects 640 times its own weight.
Since the main raw material iron of neodymium iron boron magnets is very cheap, the reserve of rare earth neodymium is 10-16 times more than that of samarium, so its price is much lower than that of samarium cobalt magnets.
The mechanical properties of neodymium iron boron magnets are better than samarium cobalt magnets and alnico magnets, and it is easier to cut, drill and process complex shapes.
The disadvantage of neodymium iron boron magnet is its poor temperature performance, large magnetic loss when used at high temperature, and low maximum working temperature. Generally, it is about 80 degrees Celsius, and the maximum working temperature of a specially treated magnet can reach 200 degrees Celsius. Because the material contains a lot of neodymium and iron, it is easy to rust and it is also a major weakness. Therefore, neodymium iron boron magnets must be surface coated. It can be electroplated with nickel (Ni), zinc (Zn), gold (Au), chromium (Cr), epoxy resin (Epoxy), etc.
NdFeB magnets are currently widely used in industrial aerospace, electronics, electromechanical, instrumentation, medical and other fields. And the use of non-technical fields is becoming more and more extensive, such as adsorption magnets, toys, jewelry and so on.
   
 Production Process:
 
Ingredients---->Smelting---->Pulverizing---->Forming---->Sintering---->Testing---->Machining---->Plating----> Magnetization---->Inspection---->Packaging
Magnetic Properties of NdFeB Magnets
material
Grade
Br Hcb Hcj (BH)max TW
T KGs KA/m KOe KA/m KOe KJ/m3 MGOe °C
N35 1.17-1.21 11.7-12.1 876-899 11.0-11.3 ≥955 ≥12 263-279 33-35 ≤80
N38 1.22-1.26 12.2-12.6 876-923 11.0-11.6 ≥955 ≥12 287-303 36-38 ≤80
N40 1.26-1.29 12.6-12.9 876-923 11.0-11.6 ≥955 ≥12 303-318 38-40 ≤80
N42 1.30-1.33 13.0-13.3 876-926 11.0-11.6 ≥955 ≥12 318-334 40-42 ≤80
N45 1.33-1.37 13.3-13.7 876-926 11.0-11.6 ≥955 ≥12 342-358 43-45 ≤80
N48 1.36-1.42 13.6-14.2 876-926 11.0-11.6 ≥955 ≥12 358-382 45-48 ≤80
N50 1.41-1.45 14.1-14.5 828-907 10.4-11.4 ≥876 ≥11 382-398 48-50 ≤70
N52 1.44-1.48 14.4-14.8 828-907 10.4-11.4 ≥876 ≥11 394-414 49.5-52 ≤70
N35M 1.17-1.21 11.7-12.1 892-915 11.2-11.5 ≥1114 ≥14 263-279 33-35 ≤100
N38M 1.22-1.26 12.2-12.6 907-931 11.4-11.7 ≥1114 ≥14 287-303 36-38 ≤100
N40M 1.26-1.29 12.6-12.9 907-947 11.4-11.9 ≥1114 ≥14 303-318 38-40 ≤100
N42M 1.30-1.33 13.0-13.3 907-947 11.4-11.9 ≥1114 ≥14 318-334 40-42 ≤100
N45M 1.33-1.37 13.3-13.7 907-955 11.4-12.0 ≥1114 ≥14 334-358 42-45 ≤100
N48M 1.36-1.42 13.6-14.2 907-955 11.4-12.0 ≥1114 ≥14 358-382 45-48 ≤100
N50M 1.41-1.45 14.1-14.5 907-971 11.4-12.2 ≥1114 ≥14 382-398 48-50 ≤100
N33H 1.14-1.17 11.4-11.7 820-876 10.3-11.0 ≥1353 ≥17 247-263 31-33 ≤120
N35H 1.17-1.21 11.7-12.1 860-907 10.8-11.4 ≥1353 ≥17 263-279 33-35 ≤120
N38H 1.22-1.26 12.2-12.6 907-947 11.4-11.9 ≥1353 ≥17 287-303 36-38 ≤120
N40H 1.26-1.29 12.6-12.9 907-947 11.4-11.9 ≥1353 ≥17 303-318 38-40 ≤120
N42H 1.30-1.33 13.0-13.3 907-947 11.4-11.9 ≥1353 ≥17 318-334 40-42 ≤120
N45H 1.33-1.37 13.3-13.7 907-947 11.4-11.9 ≥1353 ≥17 342-358 43-45 ≤120
N48H 1.36-1.42 13.6-14.2 907-971 11.4-12.2 ≥1274 ≥16 358-382 45-48 ≤110
N30SH 1.08-1.12 10.8-11.2 804-844 10.1-10.6 ≥1592 ≥20 223-239 28-30 ≤150
N33SH 1.14-1.17 11.4-11.7 820-876 10.3-11.0 ≥1592 ≥20 247-263 31-33 ≤150
N35SH 1.17-1.21 11.7-12.1 860-907 10.8-11.4 ≥1592 ≥20 263-279 33-35 ≤150
N38SH 1.22-1.26 12.2-12.6 907-947 11.4-11.9 ≥1592 ≥20 287-303 36-38 ≤150
N40SH 1.26-1.29 12.6-12.9 907-947 11.4-11.9 ≥1592 ≥20 303-318 38-40 ≤150
N42SH 1.30-1.33 13.0-13.3 907-947 11.4-11.9 ≥1592 ≥20 318-334 40-42 ≤150
N45SH 1.33-1.37 13.3-13.7 907-947 11.4-11.9 ≥1512 ≥19 342-358 43-45 ≤140
N28UH 1.04-1.08 10.4-10.8 780-812 9.8-10.2 ≥1990 ≥25 207-223 26-28 ≤180
N30UH 1.08-1.12 10.8-11.2 804-844 10.1-10.6 ≥1990 ≥25 223-239 28-30 ≤180
N33UH 1.14-1.17 11.4-11.7 820-876 10.3-11.0 ≥1990 ≥25 247-263 31-33 ≤180
N35UH 1.17-1.21 11.7-12.1 860-907 10.8-11.4 ≥1990 ≥25 263-279 33-35 ≤180
N38UH 1.22-1.26 12.2-12.6 907-947 11.4-11.9 ≥1990 ≥25 287-303 36-38 ≤180
N40UH 1.26-1.29 12.6-12.9 907-947 11.4-11.9 ≥1990 ≥25 303-318 38-40 ≤180
N28EH 1.04-1.08 10.4-10.8 780-812 9.8-10.2 ≥2388 ≥30 207-223 26-28 ≤200
N30EH 1.08-1.12 10.8-11.2 804-844 10.1-10.6 ≥2388 ≥30 223-239 28-30 ≤200
N33EH 1.14-1.17 11.4-11.7 820-876 10.3-11.0 ≥2388 ≥30 247-263 31-33 ≤200
N35EH 1.17-1.21 11.7-12.1 860-907 10.8-11.4 ≥2388 ≥30 263-279 33-35 ≤200
N38EH 1.22-1.26 12.2-12.6 860-907 10.8-11.4 ≥2388 ≥30 287-303 36-38 ≤200
N30AH 1.08-1.12 10.8-11.2 804-844 10.1-10.6 ≥2786 ≥35 223-239 28-30 ≤240

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